Abstract: A claim pre-processing system employs trial adjudication to improve claim accuracy prior to claim submission to a healthcare payer institution or other entity. A system processes claim data related to provision of healthcare to a patient The system includes a claim data collator for collating data related to a claim for a particular patient for submission to a payer and a source of rules for use in processing collated claim data. A pre-processor submits the collated claim data for processing using the rules to validate the collated claim data is in condition for processing to initiate generation of payment. A claim processor submits the collated claim data to a payer, in response to successful validation by the pre-processor. A rules processor processes acquired claim data to identify a condition triggering application of a different set of rules for determining validity of an individual claim element.